Key takeaways
Zyrtec-D (cetirizine/pseudoephedrine) and Nasonex (mometasone) are both used to treat allergy symptoms, but they work in differerent ways and have different forms. Zyrtec-D is a combination of an antihistamine (cetirizine) and a decongestant (pseudoephedrine) taken orally to relieve allergies and congestion. It can cause trouble sleeping if taken too close to bedtime and may raise your blood pressure. Nasonex, on the other hand, is a nasal spray containing a corticosteroid (mometasone) that reduces inflammation directly in your nose. It is available both over the counter and by prescription and does not cause drowsiness. While Zyrtec-D works quickly, Nasonex can take 1 to 2 weeks to show full effects. Nasonex can be used in children as young as 2 years old for allergy symptoms, whereas Zyrtec-D is typically for those 12 and older. Additionally, Nasonex may cause side effects like headaches and nosebleeds, while Zyrtec-D can cause dry mouth and drowsiness.
